For lower spec systems (ie netbook), set fx to no blur or minimum, set debris off, music off. Medal mode might also cause a hit from the higher instance count. None of these have a *huge* impact on performance; but it's enough to help.

'No blur' gives the game a slightly sharper look, too. I think I prefer it slightly.

Random stuff/glitches/ little crap I forgot to fix:- small medals are occasionally counted twice at the end of a stage- if you change weapons while a powerup is moving towards you, it will keep moving- snake segments sometimes won't die with the head section- train sections sometimes take longer to self-destruct than they should- Talons sometimes target enemies that can't be hit